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package com.sun.enterprise.deployment.annotation.introspection;


import org.jvnet.hk2.annotations.Service;
import jakarta.inject.Singleton;

import java.util.HashSet;
import java.util.Set;

/**
 * This class contains the following annotation type:
 * jakarta.ejb.Stateless
 * jakarta.ejb.Stateful
 * jakarta.ejb.MessageDriven
 *
 * @author Qingqing Ouyang
 */
@Service(name="ejb")
@Singleton
public class EjbComponentAnnotationScanner implements AnnotationScanner {

    private Set<String> annotations=null;
    
    /** Creates a new instance of DefaultAnnotationScanner */
    public EjbComponentAnnotationScanner() {}
        
    /**
     * Test if the passed constant pool string is a reference to 
     * a Type.TYPE annotation of a J2EE component
     *
     * @String the constant pool info string 
     * @return true if it is a J2EE annotation reference
     */
    public boolean isAnnotation(String value) {
        if (annotations==null) {
            synchronized(EjbComponentAnnotationScanner.class) {
                if (annotations==null)
                   init();
            }
        }
        return annotations.contains(value);
    }
    
    private void init() {
        annotations = new HashSet();
        annotations.add("Ljakarta/ejb/Stateless;");
        annotations.add("Ljakarta/ejb/Stateful;");
        annotations.add("Ljakarta/ejb/MessageDriven;");
        annotations.add("Ljakarta/ejb/Singleton;");
    }

    @Override
    public Set<String> getAnnotations() {

        return AbstractAnnotationScanner.constantPoolToFQCN(annotations);
    }
}
